28000180 has 24 divisors (see below), whose sum is σ = 63324072. Its totient is φ = 10338432.

The previous prime is 28000163. The next prime is 28000183. The reversal of 28000180 is 8100082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3139984 + 24860196 = 1772^2 + 4986^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53587 + ... + 54106.

It is an arithmetic number, because the mean of its divisors is an integer number (2638503).

Almost surely, 2^28000180 is an apocalyptic number.

28000180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28000180 is an abundant number, since it is smaller than the sum of its proper divisors (35323892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28000180 is a wasteful number, since it uses less digits than its factorization.

28000180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107715 (or 107713 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 28000180 is about 5291.5196305031. The cubic root of 28000180 is about 303.6595478838.

The spelling of 28000180 in words is "twenty-eight million, one hundred eighty", and thus it is an aban number.